[PATCH 2/4] tools/nolibc: unistd.h: apply __syscall_ret() helper

[Zhangjin Wu]

get the return type automatically and use __syscall_ret() to shrink 4
code lines.

Signed-off-by: Zhangjin Wu <falcon at tinylab.org>
---
 tools/include/nolibc/unistd.h | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/tools/include/nolibc/unistd.h b/tools/include/nolibc/unistd.h
index 6773e83c16a0..e4e2b4c09771 100644
--- a/tools/include/nolibc/unistd.h
+++ b/tools/include/nolibc/unistd.h
@@ -56,14 +56,10 @@ int tcsetpgrp(int fd, pid_t pid)
 	return ioctl(fd, TIOCSPGRP, &pid);
 }
 
-#define _syscall(N, ...)                                                      \
-({                                                                            \
-	int _ret = my_syscall##N(__VA_ARGS__);                                \
-	if (_ret < 0) {                                                       \
-		SET_ERRNO(-_ret);                                             \
-		_ret = -1;                                                    \
-	}                                                                     \
-	_ret;                                                                 \
+#define _syscall(N, ...)							\
+({										\
+	typeof(my_syscall##N(__VA_ARGS__)) _ret = my_syscall##N(__VA_ARGS__);	\
+	__syscall_ret(_ret);							\
 })
 
 #define _sycall_narg(...) __syscall_narg(__VA_ARGS__, 6, 5, 4, 3, 2, 1, 0)
-- 
2.25.1